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Wide-bandwidth, high-gain, low-temperature cofired ceramic magneto-electric dipole antenna and arrays for millimeter wave radio-over-fiber systems

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Photonics Research 2014年第4期2卷 40-44页

作者： Zheng Guo huiping tian Xudong Wang Yuefeng Ji State Key Laboratory of Information Photonics and Optical Communications Beijing 100876China School of Information and Communication Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

The designs of magneto-electric(ME)dipole antennas and 4×4 planar arrays on low-temperature cofired ceramic(LTCC)substrates are presented for radio-over-fiber(ROF)*** ME dipole antenna covers the four 2.16 GHz channels defined in the 60 GHz band from 57 to 66 *** can be used as a 4×4 planar antenna array element for high gain *** results show that the proposed antenna array achieves a variation of peak gain from 15.0 to 18.1 dBi and a peak gain up to 17.67 dBi at 60 *** is revealed that our design satisfies the 60 GHz standards ruled by IEEE 802.15.3c.

关键词： antenna fiber millimeter

Development and Application of the CGP-2 Catalyst in the MIP-CGP Process

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China Petroleum Processing & Petrochemical Technology 2007年第4期9卷 25-32页

作者： Qiu Zhonghong Long Jun tian huiping Wang Peng Research Institute of Petroleum Processing Beijing 100083

The research and development of the CGP-2 catalyst, which was used in the MIP-CGP process for reducing the olefin and sulfur contents of FCC naphtha and enhancing the propylene yield, were introduced. A specific type of metal compound was added into the matrix to provide active centers for reactions including catalytic conversion and selective adsorption of sulfur containing compounds. The CGP-2 catalyst possessed excellent hydrothermal stability to meet the requirements of the 2rid reaction zone of the MIP-CGP process. The commercial test of the said catalyst at the SINOPEC Cangzhou refinery showed that in comparison with the base case （using the CGP-1Z catalyst） the CGP-2 catalyst could reduce the sulfur content of FCC naphtha by 30.32% and increase the propylene yield along with good coke selectivity. Thus, the naphtha produced by the MIP-CGP process at the Cangzhou refinery can meet the new gasoline standard enforced in July 2005.

关键词： catalyst gasoline hydrogen transfer olefin sulfur content

CAD/CAM树脂暂时冠在乳前牙大面积缺损修复中的应用效果分析

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中国美容医学 2024年第4期33卷 157-159,178页

作者：刘东亚于雪菲田慧萍阜阳市中医医院口腔科安徽阜阳236000 阜阳市人民医院口腔科安徽阜阳236000 阜阳市第五人民医院口腔科安徽阜阳236000

目的:分析计算机辅助设计与制造(Computer aided design/Computer aided manufacturing,CAD/CAM)树脂暂时冠修复乳前牙大面积缺损的疗效。方法:选取2018年2月-2023年6月于笔者医院进行治疗的108例乳前牙大面积缺损患儿为研究对象,依据... 详细信息

目的:分析计算机辅助设计与制造(Computer aided design/Computer aided manufacturing,CAD/CAM)树脂暂时冠修复乳前牙大面积缺损的疗效。方法:选取2018年2月-2023年6月于笔者医院进行治疗的108例乳前牙大面积缺损患儿为研究对象,依据入院先后顺序将其分为两组。对照组给予光固化复合树脂充填(n=54),观察组给予CAD/CAM树脂暂时冠修复(n=54),观察两组患儿的修复效果。结果:修复后3个月,两组缺损乳前牙修复体表面情况、色泽协调性、边缘密合度、继发龋比较差异均无统计学意义(P>0.05),修复后6个月,观察组缺损乳前牙修复体表面、色泽协调性、边缘密合度、继发龋有效率均高于对照组(P0.05)。结论:CAD/CAM树脂暂时冠在乳前牙大面积缺损修复中的效果较好,较光固化复合树脂充填更能够改善患儿远期预后。

关键词：乳前牙大面积缺损计算机辅助设计与制造树脂暂时冠光固化复合树脂修复

Research and Development of Novel Heavy Oil Catalytic Cracking Catalyst RCC-1

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China Petroleum Processing & Petrochemical Technology 2014年第4期16卷 7-11页

作者： Zhang Jiexiao Zhou Yan Xu Yun tian huiping SINOPEC Research Institute of Petroleum Processing SINOPEC Catalyst Company Qilu Division

A novel heavy oil catalytic cracking catalyst RCC-1 was developed by using the ultra-stable zeolite, which was hydrothermally treated and modified through cleaning its pores to serve as the active component. The chemical composition and physicochemical properties of RCC-1 catalyst were studied by XRF, BET, pore volume analysis, attrition index analysis, and particle size distribution determination methods, and its catalytic cracking performance was also evaluated by a microreactor for light oil cracking and the ACE device. The test results showed that the new type of heavy oil catalytic cracking catalyst RCC-1 had good physicochemical properties and heavy oil cracking ability, strong anti-metallic contamination capability, good product distribution, good coke selectivity and gasoline selectivity, and excellent reduction of gasoline olefin content characteristics.

关键词： heavy oil, catalytic cracking catalyst, activity, stability

复合树脂多层修复技术与复合树脂直接粘接修复技术在前牙间隙美学修复中的效果对比

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中国美容医学 2024年第4期33卷 147-151页

作者：田慧萍施昭金莉刘东亚阜阳市第五人民医院口腔科安徽阜阳236000 阜阳市中医医院口腔科安徽阜阳236000

目的:对比分析复合树脂多层修复技术与复合树脂直接粘接修复技术在前牙间隙美学修复中的效果。方法:纳入笔者医院2020年6月-2021年6月收治的98例(共104颗患牙)前牙间隙患者作为研究对象,按照随机数表法分为A组和B组,各49例。A组患者接... 详细信息

目的:对比分析复合树脂多层修复技术与复合树脂直接粘接修复技术在前牙间隙美学修复中的效果。方法:纳入笔者医院2020年6月-2021年6月收治的98例(共104颗患牙)前牙间隙患者作为研究对象,按照随机数表法分为A组和B组,各49例。A组患者接受复合树脂多层修复技术,B组患者接受复合树脂直接粘接修复技术。对比两组修复效果、美学效果和治疗总费用,比较两组修复前和修复30d后、6个月后的咬合力、咀嚼效率和焦虑自评量表(Self-ratinganxietyscale,SAS)、抑郁自评量表(Self-rating depression scale,SDS)评分。结果:修复30 d后,A组优秀率高于B组(P0.05)。修复6个月后,A组优秀率和不良率均高于B组(P0.05)。患者的咬合力在时间、交互作用上差异有统计学意义(P0.05)。患者的咀嚼效率在时间、组间、交互作用上差异均有统计学意义(P<0.05)。修复6个月后,两组患者咬合力和咀嚼效率均较修复30d后和修复前升高,且A组咬合力和咀嚼效率高于B组(P<0.05)。A组修复后的边缘密合性、颜色匹配性、修复体崩裂、继发龋损、形态匹配、修复体脱落和牙龈健康评分均低于B组(P<0.05)。患者的SAS评分和SDS评分在时间、组间、交互作用上有统计学意义(均P<0.05)。修复30d后和修复6个月后,两组患者SAS和SDS评分均较修复前降低,且A组低于B组(P<0.05)。A组治疗总花费高于B组(P<0.05)。结论:与复合树脂直接粘接修复技术相比,在前牙间隙美学修复中应用复合树脂多层修复技术可取得更佳的修复效果,有助于恢复患者咬合力和咀嚼功能,使患者获得良好美学效果,改善其心理状态。但治疗总花费相对较高,临床治疗需结合患者经济情况选择合适治疗方案。

关键词：前牙间隙复合树脂多层修复复合树脂直接粘接修复美学修复咀嚼功能治疗费用

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Aromatization and isomerization of methylcyclohexane over Ni catalysts supported on different supports

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Green Energy & Environment 2019年第1期4卷 75-82页

作者： Ye Song Wei Lin Xingcui Guo Linlin Dong Xindong Mu huiping tian Lei Wang Research Institute of Petroleum Processing SINOPEC CASKey Laboratory of Bio-based Materials Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences

In this work, nickel metal supported on different supports(SiO_2, Al_2O_3, ZSM-5) were prepared by spraying nickel nitrate on the supports and calcined at 873 K. Then, they were characterized by XRD, XRF, N_2 adsorption–desorption, NH_3-TPD, MCH-TPD, H_2-TPR, and pyridine-FTIR,and tested as catalysts for the dehydrogenation aromatization and isomerization of methylcyclohexane(MCH) under the conditions of S-Zorb catalytic adsorption desulfurization(T ? 673 K, P ? 1.5 MPa, WHSV ? 5 h^(-1)). The H2-TPR results showed that the interaction of NiO with support decreased in the order of NiO/ZSM-5-Fe < NiO/ZSM-5 < NiO/Al_2O_3< NiO/SiO2. The decrease of the interaction appeared to facilitate the reduction of Ni and therefore to promote the dehydrogenation aromatization of *** was found that a direct correlation existed between the gasoline components yields, cracking activity and the total number of different supports acid sites measured by NH_3-TPD tests. Higher total acidity of ZSM-5 resulted in gasoline loss because of higher cracking activity of MCH. The number of total acid sites of NiO/ZSM-5-Fe decreased and the medium strong Br€onsted acid sites necessary for MCH isomerization increased after the modification of ZSM-5 by iron metal. So, NiO/ZSM-5-Fe exhibited enhanced MCH conversion, aromatic and isomerization yields when compared to NiO/ZSM-5 and other Ni-based catalysts. This study shows that NiO/ZSM-5-Fe catalyst may be possible to be integrated into the S-Zorb system achieving the recovery of the octane number of gasoline.

关键词： Modified ZSM-5 Methylcyclohexane Aromatization Octane number

Study on the Performance and Commercial Application of New Generation DMMC-1 Type Catalyst for Deep Catalytic Cracking

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China Petroleum Processing & Petrochemical Technology 2007年第4期9卷 1-6页

作者： Long Jun tian huiping Liu Yujian Xie Chaogang Li Jibing Research Institute of Petroleum Processing SINOPEC Beijing 100083 SINOPEC Anqing Branch Company

Over the past decades SINOPEC has been uninterruptedly engaging in the development and upgrading of deep catalytic cracking （DCC） technology for manufacturing propylene from heavy oil. Recently SINOPEC after having made a lot of progress in the area of oil refining at the molecular level has developed a new generation DMMC-1 type catalyst designed for the DCC process. The laboratory evaluation tests have shown that compared to the existing MMC-2 type catalyst that features the best comprehensive performance, the DMMC-1 type catalyst has increased the propylene yield by 2.2% with the propylene selectivity increased by 10%. The said catalyst has improved its ability for heavy oil cracking and coke selectivity along with reduction of olefin content in gasoline to achieve a better product distribution and improve the product quality. The results of application of the said catalyst in a 650-kt/a commercial DCC unit at SINOPEC Anqing Branch Company have revealed that the DMMC- 1 catalyst demonstrated an enhanced capability for heavy oil cracking and could increase the total liquid yield to 84.56 m% from 83.92 m%, the LPG yield to 38.90 m % from 34.60 m %, the propylene yield to 17.80 m% from 15.37 m% and the propylene concentration to 45.91 m% from 44.91 m%, and reduce the coke yield from 7.61 m% to 7.05 m% and the olefin content in gasoline from 42.3 v% to 37.5 v%, resulting in an incremental profit amounting to 52.19 million RMB a year. This technology has further upgraded and developed the DCC technology which has been commanding a leading position among the industry peers.

关键词： petrochemicals propylene DCC catalyst kinetics of catalytic reactions active site accessibility and availability

Study on Zn_2SiO_4 Formation Kinetics and Activity Stability of Desulfurization Sorbent

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China Petroleum Processing & Petrochemical Technology 2015年第1期17卷 6-15页

作者： Zou Kang Lin Wei tian huiping Xu Guangtong Wang Lei Xu Hua SINOPEC Research Institute of Petroleum Processing

A new industrial S Zorb sorbent(Ni/Zn O-P) was prepared by using the spray drying technique. The other two traditional sorbents(Ni/Zn O-M and Ni/Zn O-H) were prepared in exactly the same way except the use of different silica-alumina binder matrices. The XRD, Rietveld quantitative phase analysis, BET, and laser particle size analysis were employed to characterize their physico-chemical properties. The deactivation mechanism and desulfurization kinetics of sorbent was investigated on a water vapor aging treatment device. It was shown that both the water vapor pressure and reaction temperature significantly could influence the formation rate of inactive Zn2 Si O4, which could decrease the sulfur storage capacity of sorbents. The Zn2 Si O4 content profiles could be fitted into the zero order equation, from which the apparent rate constant k and the activation energy E a were calculated. The matrix P greatly raised the E a of Zn2 Si O4 formation due to the less bridged hydroxyl silanol groups on its surface, which accounted for the high stability of Ni/Zn O-P. The desulfurization performance of the fresh and aged sorbents showed that the overall average sulfur conversion of Ni/Zn O-P(aged) was 92%, which was close to that of fresh sorbents(95%), and was higher than that of Ni/Zn O-M(aged)(86%) and Ni/Zn O-H(aged)(90%). Based on these findings, the application of Ni/Zn O-P can greatly improve the long-term running stability of the industrial unit.

关键词： kinetics, Zn2SiO4, desulfurization activity, sorbent, high stability

Silica-Dominated Matrix Platform and Its Application in FCC Catalysts

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China Petroleum Processing & Petrochemical Technology 2009年第4期11卷 1-3页

作者： Yan Jiasong tian huiping Long Jun (Research Institute of Petroleum Processing,Beijing 100083) Research Institute of Petroleum Processing Beijing 100083 China

An advanced silica-dominated matrix technology platform and its application were introduced in this paper. Through novel proprietary processing,the advanced silica-dominated matrix was prepared from the unique silica sol and *** matrix pore size distribution and acidity can be tailored to provide optimal coke-selectivity and bottoms-cracking ability matched to feedstock characteristics.A novel FCC catalyst(RSC-2006) for reducing coke and slurry yields was developed based on the silica-dominated matrix technology *** results of commercial application of the said technology indicated that the RSC-2006 catalyst exhibited excellent performance on bottoms cracking,coke selectivity and high value products yields.

关键词： matrix FCC catalyst silica sol bottoms cracking coke selectivity